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Approximate number densities (n) and temperatures (T ) of some typical plasmas. The temperature is measured in electronvolts (eV), with 1 eV = 11,605 K. The region above and to the left of the diagonal line represents strongly coupled plasmas (nλD3…

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from article Plasma (physics)

Helicon plasma, which is generated by whistler waves, which then propagate in the plasma. (a) Plasma source. (b) Plasma in a Pyrex chamber mounted inside the magnetic field coils. (Bruce Fritz, University of Wisconsin Engineering Center for Plasma…

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from article Plasma (physics)

Tokamaks. (a) Diagram of tokamak plasma and magnetic field. (b) Interior of the reaction chamber of the Tokamak Fusion Test Reactor (TFTR).

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from article Plasma (physics)

Wafer mounted inside the inductive source used for plasma etching. The surface magnetic field produced by the permanent magnets helps to confine the plasma. (Bruce Fritz, University of Wisconsin Engineering Center for Plasma Aided Physics)

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from article Plasma (physics)

Earth's magnetosphere. The magnetotail extends for a long distance off the figure to the right, away from the Sun.

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from article James Webb Space Telescope (JWST)

Artist's impression of the James Webb Space Telescope. (Credit: NASA)

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from article James Webb Space Telescope (JWST)

Illustration of the James Webb Space Telescope with its four main elements—the Optical Telescope Element (OTE), the Integrated Science Instrument Module (ISIM), the sunshield, and the spacecraft bus—labeled. (Credit: NASA)

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from article James Webb Space Telescope (JWST)

Illustration of the James Webb Space Telescope's travel to its L2 destination with notable deployments labeled. (Note: Illustration not to scale.) (Credit: NASA)

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from article Herrings

A composite herring. (Illustration courtesy of the Food and Agriculture Organization of the United Nations)

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from article Herrings

Three clupeid juveniles: (top) Atlantic herring (Clupea harengus); (middle) blueback herring (Alosa aestivalis); and (bottom) alewife (Alosa pseudoharengus). (Photo courtesy of Justin Stevens, Northeast Fisheries Science Center, National Oceanic and…